Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Percentage contrast-to-noise ratio (CNR) change as a function of subjective assessment of overall image quality for hepatic harmonic images. The mean CNR change is positive for all levels of image quality. The CNR increase for image quality level 1 is significantly lower than the CNR increase for image quality levels 2 and 3 (p ≤ 0.005).
